// graph-tool -- a general graph modification and manipulation thingy
//
// Copyright (C) 2006-2020 Tiago de Paula Peixoto <tiago@skewed.de>
//
// This program is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the Free
// Software Foundation; either version 3 of the License, or (at your option) any
// later version.
//
// This program is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
// details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.

#ifndef GRAPH_PROPERTIES_GROUP_HH
#define GRAPH_PROPERTIES_GROUP_HH

namespace graph_tool
{

template <class Group = boost::mpl::true_, class Edge = boost::mpl::false_>
struct do_group_vector_property
{

    template <class Graph, class VectorPropertyMap, class PropertyMap>
    void operator()(Graph& g, VectorPropertyMap vector_map, PropertyMap map,
                    size_t pos) const
    {
        parallel_vertex_loop
            (g,
             [&](auto v)
             {
                 this->dispatch_descriptor(g, vector_map, map, v, pos, Edge());
             });
    }

    template <class Graph, class VectorPropertyMap, class PropertyMap,
              class Descriptor>
    inline void dispatch_descriptor(Graph& g, VectorPropertyMap& vector_map,
                                    PropertyMap& map, const Descriptor& v,
                                    size_t pos, boost::mpl::true_) const
    {
        for (auto e : out_edges_range(v, g))
        {
            auto& vec = vector_map[e];
            if (vec.size() <= pos)
                vec.resize(pos + 1);
            group_or_ungroup(vector_map, map, e, pos, Group());
        }
    }

    template <class Graph, class VectorPropertyMap, class PropertyMap,
              class Descriptor>
    inline void dispatch_descriptor(Graph&, VectorPropertyMap& vector_map,
                                    PropertyMap& map, const Descriptor& v,
                                    size_t pos, boost::mpl::false_) const
    {
        if (vector_map[v].size() <= pos)
            vector_map[v].resize(pos + 1);
        group_or_ungroup(vector_map, map, v, pos, Group());
    }

    template <class VectorPropertyMap, class PropertyMap, class Descriptor>
    inline void group_or_ungroup(VectorPropertyMap& vector_map,
                                 PropertyMap& map, const Descriptor& v,
                                 size_t pos, boost::mpl::true_) const
    {
        convert(get(map,v),  vector_map[v][pos]);
    }

    template <class VectorPropertyMap, class PropertyMap, class Descriptor>
    inline void group_or_ungroup(VectorPropertyMap& vector_map,
                                 PropertyMap& map, const Descriptor& v,
                                 size_t pos, boost::mpl::false_) const
    {
        convert(vector_map[v][pos], map[v]);
    }

    template <class RetVal, class Value>
    inline void convert(const Value& v, RetVal& r)  const
    {
        r = boost::lexical_cast<RetVal>(v);
    }

    template <class RetVal>
    inline void convert(const boost::python::object& v, RetVal& r)  const
    {
        #pragma omp critical
        r = boost::python::extract<RetVal>(v);
    }

    template <class Value>
    inline void convert(const Value& v, boost::python::object& r)  const
    {
        #pragma omp critical
        r = boost::python::object(v);
    }

    template <class Value>
    inline void convert(const Value& v, Value& r)  const
    {
        r = v;
    }

    inline void convert(const boost::python::object& v, boost::python::object& r)  const
    {
       #pragma omp critical
        r = v;
    }

};

} // namespace graph_tool

#endif // GRAPH_PROPERTIES_GROUP_HH
